Organized at Springfield June 21, 1861.
Moved to Washington, D.C., July 25-28. Attached to Couch's Brigade, Division of the
Potomac, to October, 1861. Couch's Brigade, Buell's (Keyes') Division, Army of the
Potomac, to March, 1862. 1st Brigade, 1st Division, 4th Army Corps, Army of the Potomac,
to September, 1862. 1st Brigade, 3rd Division, 6th Army Corps, to October, 1862. 2nd
Brigade, 3rd Division, 6th Army Corps, to January, 1864. 4th Brigade, 2nd Division, 6th
Army Corps, to July, 1864.

SERVICE.--Duty at Kalorama Heights and Camp
Brightwood, Defenses of Washington, D.C., until March, 1862. March to Prospect Hill, Va.,
March 11-15. Embarked at Alexandria for the Peninsula, Virginia, March 25. Siege of
Yorktown April 5-May 4. Battle of Fair Oaks, Seven Pines, May 31-June 1. Seven days before
Richmond June 25-July 1. Oak Grove, near Seven Pines, June 25. White Oak Swamp June 30.
Malvern Hill July 1. At Harrison's Landing until August 16. Reconnaissance to Turkey
Island August 5-6, and to Haxall's Landing August 8-11. Movement to Alexandria August
16-September 1, thence march into Maryland September 3-18. Battle of Antietam September
18. At Downsville September 18-October 20. Movement to Stafford C. H. October 20-November
18, and to Belle Plains December 5. Battle of Fredericksburg, Va., December 12-15.
"Mud March" January 20-24, 1863. Chancellorsville Campaign April 27-May 6.
Operations at Franklin's Crossing April 29-May 2. Maryes Heights, Fredericksburg, May 3.
Salem Heights May 3-4. Banks' Ford May 4. Franklin's Crossing June 6-7. Battle of
Gettysburg, Pa., July 2-4. Bristoe Campaign October 9-22. Rappahannock Station November 7.
Mine Run Campaign November 26-December 2. At Brandy Station until May 1, 1864.
Reconnaissance to Madison C. H. February 27-March 2. Rapidan Campaign May-June. Battles of
the Wilderness May 5-7. Spottsylvania May 8-12. Spottsylvania C. H. May 12-21. Assault on
the Salient at Spottsylvania C. H. May 12. North Anna River May 23-26. Line of the
Pamunkey June 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Before Petersburg June
17-19. Ordered home for muster out June 19. Mustered out July 6, 1864.

Regiment lost during service 10 Officers and
124 Enlisted men killed and mortally wounded and 1 Officer and 55 Enlisted men by disease.
Total 190.

11th
Regiment Infantry

Organized at Readville and mustered in June
13, 1861. Left State for Washington, D.C., June 24. Attached to Franklin's Brigade,
Heintzelman's Division, McDowell's Army of Northeast Virginia, to August, 1861. Hooker's
Brigade, Division of the Potomac, to October, 1861. 1st Brigade, Hooker's Division, Army
of the Potomac, to March, 1862. 1st Brigade, 2nd Division, 3rd Army Corps, Army of the
Potomac, to March, 1864. 2nd Brigade, 4th Division, 2nd Army Corps, Army of the Potomac,
to May, 1864. 4th Brigade, 3rd Division, 2nd Army Corps, to June, 1864. 3rd Brigade, 3rd
Division, 2nd Army Corps, to June, 1865.

SERVICE.--Advance on Manassas, Va., July
16-21, 1861. Battle of Bull Run July 21. Moved to Bladensburg August 10, thence to Budd's
Ferry October 27. Duty in that vicinity until April, 1862. Ordered to Fortress Monroe,
Va., April 7. Siege of Yorktown, Va., April 16-May 4. Affair at Yorktown April 26 (Cos.
"A" and "G"). Battle of Williamsburg May 5. Battle of Fair Oaks, Seven
Pines, May 31-June 1. Seven days before Richmond June 25-July 1. Oak Grove, near Fair
Oaks, June 25. Savage Station June 29. White Oak Swamp and Glendale June 30. Malvern Hill
July 1 and August 5. At Harrison's Landing until August 15. Movement to Fortress Monroe,
thence to Centreville August 15-26. Bristoe Station August 26-27. Kettle Run August 27.
Catlett's Station August 28. Groveton August 29. Bull Run August 30. Chantilly September
1. Camp near Fort Lyon until September 13, and near Fairfax Seminary until October 20. At
Munson's Hill until November. At Fairfax Station November 2-25. Operations on Orange &
Alexandria R. R. November 10-12. Rappahannock Campaign December, 1862, to June, 1863.
Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863.
Operations at Rappahannock Bridge and Grove Church February 5-7. At Falmouth until April
27. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5.
Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 1-4. Wapping Heights
July 23. Moved to New York July 30-August 1, and duty there until October. rejoin Corps at
Union Mills October 17. Advance to the Rappahannock November 7-8. Kelly's Ford November 7.
Mine Run Campaign November 26-December 2. Payne's Farm November 27. Duty near Brandy
Station until May, 1864. Demonstration on the Rapidan February 6-7. Rapidan Campaign
May-June. Battles of the Wilderness May 5-7. Spottsylvania May 8-12, Spottsylvania C. H.
May 12-21. Assault on the Salient at Spottsylvania G. H. May 12. Harris Farm,
Fredericksburg Road, May 19. North Anna River May 23-26. Line of the Pamunkey May 26-28.
Totopotomoy May 28-31. Cold Harbor June 1-12. (Old members left front June 12. Mustered
out June 24, 1864.) Veterans and Recruits consolidated to a Battalion of 5 Companies June
12. Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865.
Jerusalem Plank Road June 22-23, 1864. Demonstration on north side of the James July
27-29. Deep Bottom July 27-28. Mine Explosion, Petersburg, July 30 (Reserve).
Demonstration on north side of the James River August 13-20. Strawberry Plains August
14-18. Peeble's Farm, Poplar Grove Church, September 29-October 2. Boydton Plank Road,
Hatcher's Run, October 27-28. In front of Fort Morton November 5. Expedition to Weldon
Railroad December 7-11. Watkin's House March 25, 1865. Appomattox C. H. March 28-April 9.
Crow's House March 31. Fall of Petersburg April 2. Sailor's Creek April 6. High Bridge and
Farmville April 7. Appomattox C. H. April 9. Surrender of Lee and his army. March to
Burkesville April 11-13, and duty there until May 2. March to Washington, D.C., May 2-15.
Grand Review May 23. Mustered out June 14, 1865.

Regiment lost during service 11 Officers and
153 Enlisted men killed and mortally wounded and 2 Officers and 95 Enlisted men by
disease. Total 261.

12th
Regiment Infantry

Organized at Fort Warren and mustered in
June 26, 1861. Moved to Sandy Hook, Md., July 23-27. Attached to George H. Thomas'
Brigade, Dept. of the Shenandoah, to October, 1861. Abercrombie'$ Brigade, Banks'
Division, Army of the Potomac, to March, 1862. 2nd Brigade, Williams' 1st Division, Banks'
5th Army Corps and Dept. of the Shenandoah, to May, 1862. 3rd Brigade, 2nd Division, Dept.
of the Rappahannock, to June, 1862. 3rd Brigade, 2nd Division, 3rd Army Corps, Army of
Virginia, to September, 1862. 3rd Brigade, 2nd Division, 1st Army Corps, Army of the
Potomac, to November, 1862. 2nd Brigade, 2nd Division, 1st Army Corps, to March, 1864. 2nd
Brigade, 2nd Division, 5th Army Corps, to May, 1864. 2nd Brigade, 3rd Division, 5th Army
Corps, to July, 1864.

SERVICE.--Operations on the Upper Potomac
August, 1861, to February, 1862. Operations opposite Edward's Ferry October 21-24, 1861.
Operations in the Shenandoah Valley March 24-April 27. Strasburg March 27. Edenburg April
1-2. Rappahannock Crossing April 18. Battle of Cedar Mountain August 9. Pope's Campaign in
Northern Virginia August 16-September 2. Rappahannock Station August 20-23. Thoroughfare
Gap August 28. Bull Run August 30. Chantilly September 1. Maryland Campaign
September-October. Battles of South Mountain September 14, and Antietam September 16-17.
Duty at Sharpsburg until October 30. Movement to Warrenton, thence to Falmouth, Va.,
October 30-November 19. Battle of Fredericksburg December 12-15. "Mud March"
January 20-24, 1863. At Falmouth and Belle Plain, Va., until April 27. Chancellorsville
Campaign April 27-May 6. Operations at Pollock's Mill Creek April 29-May 2. Fitzhugh's
Crossing April 29-30. Battle of Chancellorsville May 1-5. Gettysburg (Pa.) Campaign June
11-July 24. Battle of Gettysburg July 1-3. Picket duty on the Rapidan until October.
Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8. Mine Run
Campaign November 26-December 2. Demonstration on the Rapidan February 6-7, 1864. Campaign
from the Rapidan to the James May-June, 1864. Battles of the Wilderness May 5-7; Laurel
Hill May 8; Spottsylvania May 8-12; Spottsylvania Court House May 12:21. Assault on the
Salient May 12. North Anna River May 23-26. Jericho Ford May 23. Line of the Pamunkey May
26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Bethesda Church June 1-3. White Oak
Swamp June 13. Before Petersburg June 16-18. Ordered home for muster out June 25. Mustered
out July 8, 1864.

Regiment lost during service 18 Officers and
175 Enlisted men killed and mortally wounded and 83 Enlisted men by disease. Total 276.

SERVICE.--Patrol and outpost duty on the
Upper Potomac until March, 1862. Action at Beller's Mill, near Harper's Ferry, W. Va.,
September 2, 1861. Pritchard's Mills September 18 (2 Cos.). Bolivar Heights near Harper's
Ferry, October 16. (Cos. "C," "D," "I" and "K"
detached at Hancock, Md., January 5-30, 1862.) Operations in the Shenandoah Valley March
and April. Occupation of Winchester, Va., March 12. Pursuit of Jackson up the Valley March
24-April 27. Guard duty on the Orange & Alexandria Railroad May 3-18. Battle of Cedar
Mountain August 9. Pope's Campaign in Northern Virginia August 16-September 2.
Thoroughfare Gap August 28. Battle of Bull Run August 30. Chantilly September 1. Maryland
Campaign September-October. Battles of South Mountain September 14, and Antietam September
16-17. At Sharpsburg until October 30. Movement to Warrenton, thence to Falmouth, Va.,
October 30-November 19. Battle of Fredericksburg December 12-15. "Mud March"
January 20-24, 1863. At Falmouth and Belle Plain until April 27. Chancellorsville Campaign
April 27-May 6. Operations at Pollock's Mill Creek April 29-May 2. Fitzhugh's Crossing
April 29-30. Battle of Chancellorsville May 2-5. Gettysburg (Pa.) Campaign June 11-July
24. Battle of Gettysburg July 1-3. Picket duty along the Rapidan until October --. Bristoe
Campaign October 9-22. Advance to line of the Rappahanock November 7-8. Mine Run Campaign
November 26-December 2. Duty on the Orange & Alexandria Railroad until April, 1864.
Demonstrations on the Rapidan February 6-7. Campaign from the Rapidan to the James
May-June. Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Spottsylvania Court
House May 12-21. Assault on the Salient May 12. North Anna River May 23-26. Jericho Ford
May 23. Line of the Pamunkey June 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12.
Bethesda Church June 1-3. White Oak Swamp June 13. Before Petersburg June 16-18. Siege of
Petersburg June 16-July 14. Mustered out August 1, 1864.

Regiment lost during service 4 Officers and
117 Enlisted men killed and mortally wounded and 40 Enlisted men by disease. Total 161.

14th
Regiment Infantry (Essex County Regiment)

Organized at Fort Warren and mustered in
July 5, 1861. Left State for Washington, D.C., August 7. At Camp Kalorama until August 18.
Moved to Fort Albany. Garrison duty in the Defenses of Washington until January, 1862.
Designation of Regiment changed by order of the War Department to 1st Massachusetts Heavy
Artillery January 1, 1862. (See 1st Heavy Artillery.

15th
Regiment Infantry

Organized at Worcester and mustered in June
12, 1861. Moved to Washington, D.C., August 8-11. Attached to German's Brigade, Stone's
(Sedgwick's) Division, Army of the Potomac, to March, 1862. 1st Brigade, 2nd Division, 2nd
Army Corps, Army of the Potomac, to July, 1864.

SERVICE.--At Camp Kalorama until August 25,
1861. March to Poolesville, Md., August 25-27. Picket and outpost duty on the Upper
Potomac from Conrad's Ferry to Harrison's Island until October 20. Operations on the
Potomac October 21-24. Battle of Ball's Bluff October 21. At Harper's Ferry and Bolivar
Heights until March 7, 1862. At Charlestown until March 10. At Berryville until March 13.
Movement toward Winchester and return to Bolivar Heights March 13-15. Moved to Fortress
Monroe March 22-April 1. Siege of Yorktown April 5-May 4. Battle of Fair Oaks, Seven
Pines, May 31-June 1. Seven days before Richmond June 25-July 1. Peach Orchard and Savage
Station June 29. White Oak Swamp and Glendale June 30. Malvern Hill July 1. At Harrison's
Landing until August 15. Movement to Alexandria August 15-28, and to Centreville August
29-30. Cover Pope's retreat August 31-September 1. Battle of Antietam, Md., September
16-17. Moved to Harper's Ferry September 22 and duty there until October 30. Movement to
Falmouth, Va., October 30-November 20. Battle of Fredericksburg December 12-15. "Mud
March" January 20-24, 1863. Chancellorsville Campaign April 27-May 6. Maryes Heights,
Fredericksburg, May 3. Salem Heights May 3-4. Banks' Ford May 4. Battle of Gettysburg,
Pa., July 2-4. Advance from the Rappahannock to the Rapidan September 13-17. Bristoe
Campaign October 9-22. Bristoe Station October 14. Advance to line of the Rappahannock
November 7-8. Mine Run Campaign November 26-December 2. Robertson's Tavern or Locust Grove
November 27. Morton's Ford February 6-7, 1864. Picketing Rapidan until May, 1864. Campaign
from the Rapidan to the James May-June. Battles of the Wilderness May 5-7; Laurel Hill May
8; Spottsylvania May 8-12; Po River May 10; Spottsylvania Court House May 12-21. Assault
on the Salient at Spottsylvania Court House May 12. North Anna River May 23-26. Line of
the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Before Petersburg
June 16-18. Siege of Petersburg June 16-July 12. Jerusalem Plank Road June 22-23. Left the
front July 12. Mustered out July 28, 1864. Veterans and Recruits transferred to 20th
Massachusetts.

Regiment lost during service 14 Officers and
227 Enlisted men killed and mortally wounded and 1 Officer and 121 Enlisted men by
disease. Total 363.

16th
Regiment Infantry

Organized at Camp Cameron, Cambridge, June
29, 1861. Left State for Old Point Comfort, Va., August 17. Attached to Fortress Monroe,
Dept. of Virginia, to May, 1862, 1st Brigade, 1st Division, Dept. of Virginia, to June,
1862. 1st Brigade, 2nd Division, 3rd Army Corps, Army of the Potomac, to March, 1864. 1st
Brigade, 4th Division, 2nd Army Corps, to May, 1864. 3rd Brigade, 3rd Division, 2nd Army
Corps, to July, 1864.

SERVICE.--Garrison duty at Fortress Monroe,
Va., September 1, 1862, to May 8, 1862. Occupation of Norfolk May 10. Moved to Suffolk May
17, and joined Army of the Potomac at Fair Oaks June 13. Nine-Mile Road, near Richmond,
June 18. Seven days before Richmond June 25-July 1. Oak Grove, near Fair Oaks, June 25.
White Oak Swamp and Glendale June 30. Malvern Hill July 1 and August 5. Duty at Harrison's
Landing until August 15. Movement to Fortress Monroe, thence to Centreville August 15-26.
Bristoe Station, Kettle Run, August 27. Battles of Groveton August 29; Bull Run August 30;
Chantilly September 1. Duty at Fort Lyon and at Fairfax Station, Defenses of Washington,
until October 30, and at Munson's Hill until November 2. At Fairfax Station until November
25. Operations on Orange & Alexandria Railroad November 10-12. Rappahannock Campaign
December, 1862, to June, 1863. Battle of Fredericksburg, Va., December 12-15. "Mud
March" January 20-24, 1863. At Falmouth until April 27. Chancellorsville Campaign
April 27-May 6. Battle of Chancellorsville May 1-5. Gettysburg (Pa.) Campaign June 11-July
24. Battle of Gettysburg, Pa., July 1-3. Wapping Heights, Va,, July 23. Bristoe Campaign
October 9-22. Advance to the Rappahannock November 7-8. Kelly's Ford November 7. Mine Run
Campaign November 26-December 2. Payne's Farm November 27. Demonstration on the Rapidan
February 6-7, 1864. Duty near Brandy Station until May, 1864. Rapidan Campaign May-June,
Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Spottsylvania Court House May
12-21. Assault on the Salient, Spottsylvania Court House, May 12. Harris' Farm,
Fredericksburg Road, May 19. North Anna River May 23-26. Ox Ford May 23-24. On line of the
Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Before Petersburg June
16-18. Siege of Petersburg June 16-July 11. Jerusalem Plank Road June 22-23. Left front
for muster out July 11. Veterans and Recruits transferred to the 11th Massachusetts
Infantry. Mustered out July 27, 1864.

Regiment lost during service 16 Officers and
134 Enlisted men killed and mortally wounded and 2 Officers and 93 Enlisted men by
disease. Total 245.

17th
Regiment Infantry

Organized at Lynnfield July 22, 1861. Left
State for Baltimore, Md., August 23. Attached to Dix's Command, Baltimore, Md., to March,
1862. Foster's 1st Brigade, Burnside's Expeditionary Corps, to April, 1862. 1st Brigade,
1st Division, Dept. of North Carolina, to December, 1862. Amory's Brigade, Dept. of North
Carolina, to January, 1863. 1st Brigade, 1st Division, 18th Army Corps, Dept. of North
Carolina, to July, 1863, Defenses of New Berne, N. C., Dept. of Virginia and North
Carolina, to July, 1864. Sub-District of Beaufort, N. C., Dept. of Virginia and North
Carolina, to January, 1865. Sub-District of Beaufort, N. C., Dept. of North Carolina, to
March, 1865. 3rd Brigade, 2nd Division, District of Beaufort, N. C, Dept. of North
Carolina, to March, 1865. 1st Brigade, Division District of Beaufort, to April, 1865. 3rd
Brigade, 3rd Division, 23rd Army Corps, to July, 1865.

SERVICE.--Duty at Baltimore, Md., until
March, 1862. Ordered to New Berne, N. C., March 12, and duty there until December.
Reconnaissance toward Trenton May 15-16. Trenton Bridge May 15. Trenton and Pollocksville
Road May 22 (Co. "I"). Expedition to Trenton and Pollocksville July 24-28.
Demonstration on New Berne November 11. Foster's Expedition to Goldsboro December 11-20.
Kinston December 14. Whitehall December 16. Goldsboro December 17. Provost duty at and
near New Berne until April, 1863. March to relief of Washington, N. C., April 7-10.
Blount's Creek April 9. Expedition to Washington April 17-19. Expedition toward Kinston
April 27-May 1. Wise's Cross Roads and Dover Road April 28. Expedition to Thenton July
4-8. Quaker Bridge July 6. Raid on Weldon July 25-August 1. Duty at New Berne until
February, 1864. Operations about New Berne against Whiting January 18-February 10, 1864.
Skirmishes at Beech Creek and Batchelor's Creek February 1-3. Expedition to Washington
April 18-22. Washington April 27-28. Duty at New Berne and vicinity until July 27, and at
Newport Barracks until September 23. Veterans on furlough until November 10. Duty at
Newport Barracks November 20, 1864, to March 4, 1865. Moved to Core Creek. Battle of
Wise's Forks March 8-10, 1865. Occupation of Kinston March 15. Occupation of Goldsboro
March 21. Advance on Raleigh April 9-14. Occupation of Raleigh April 14. Duty at
Greensboro May 5-July 11. Mustered out at Greensboro, N. C., July 11, 1865.

Regiment lost during service 21 Enlisted men
killed and mortally wounded and 4 Officers and 147 Enlisted men by disease. Total 172.

18th
Regiment Infantry

Organized at Readville and Boston and
mustered in August 27, 1861. Left State for Washington, D.C., August 28. Attached to Fort
Corcoran, Defenses of Washington, to October, 1861. Martindale's Brigade, Porter's
Division, Army of the Potomac, to March, 1862. 1st Brigade, 1st Division, 3rd Army Corps,
Army of the Potomac, to May, 1862. 1st Brigade, 1st Division, 5th Army Corps, Army of the
Potomac, to March, 1864. 3rd Brigade, 1st Division, 5th Army Corps, to October, 1864.

SERVICE.--Duty at Fort Corcoran, Defenses of
Washington, D.C., until September 26, 1861, and at Hall's Hill, Va., until March 10, 1862.
Advance on Manassas, Va., March 10-16, 1862. Moved to Alexandria, thence to Fortress
Monroe March 16-23. Reconnaissance to Great Bethel March 27. Warwick Road April 5. Siege
of Yorktown April 5-May 4. Battle of Hanover Court House May 27. Operations about Hanover
Court House May 27-29. Seven days before Richmond June 25-July 1. Operations about White
House Landing June 26-July 2. At Harrison's Landing until August 15. Retreat from the
Peninsula and movement to Centreville August 15-28. Battle of Bull Run August 30. Battle
of Antietam, Md., September 16-17. Shepherdstown Ford September 19. Shepherdstown, W. Va.,
September 20. At Sharpsburg until October 30. Movement to Falmouth, Va., October
30-November 19. Battle of Fredericksburg December 12-15. Expedition to Richards and Ellis
Fords December 29-30. "Mud March" January 20-24, 1863. Duty at Falmouth until
April 27. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5.
Gettysburg (Pa,) Campaign June 11-July 24. Ashby's Gap June 21. Battle of Gettysburg July
1-3. Williamsport, Md., July 14. At Warrenton and Beverly Ford July 27 to September 17,
and at Culpeper until October 11. Bristoe Campaign October 11-22. Advance to line of the
Rappahannock November 7-8. Rappahannock Station November 7. Mine Run Campaign November
26-December 2. At and near Brandy Station and Stevensburg until May, 1864. Campaign from
the Rapidan to the James May-June. Battles of the Wilderness May 5-7; Laurel Hill May 8;
Spottsylvania May 8-12; Spottsylvania Court House May 12-21. Assault on the Salient May
12. North Anna River May 23-26. Jericho Ford May 23. On line of the Pamunkey May 26-28.
Totopotomoy May 28-31. Cold Harbor June 1-12. Bethesda Church June 1-3. Before Petersburg
June 16-18. Siege of Petersburg June 16 to October 21. Weldon Railroad June 21-23. Old
members left front July 20 and mustered out September 2, 1864. Veterans and Recruits
consolidated to a Battalion. Poplar Springs' Church, Peeble's Farm, September 30-October
2. Consolidated with 32nd Massachusetts Infantry October 21, 1864.

Regiment lost during service 9 Officers and
114 Enlisted men killed and mortally wounded and 2 Officers and 127 Enlisted men by
disease. Total 252.

19th
Regiment Infantry

Organized at Lynnfield August 28, 1861. Left
State for Washington, D.C., August 30. Attached to Lander's Brigade, Division of the
Potomac, to October, 1861. Lander's Brigade, Stone's (Sedgwick's) Division, Army of the
Potomac, to March, 1862. 3rd Brigade, 2nd Division, 2nd Army Corps, Army of the Potomac,
to March, 1864. 1st Brigade, 2nd Division, 2nd Army Corps, to June, 1865.

SERVICE.---Camp at Meridian Hill until
September 12, 1861. Moved to Poolesville, Md., September 12-15. Guard duty on the Upper
Potomac until December. Operations on the Potomac October 21-24. Action at Ball's Bluff
October 21. Moved to Muddy Run December 4, and duty there until March 12, 1862. Moved to
Harper's Ferry, thence to Charlestown and Berryville March 12-15. Ordered to Washington,
D.C., March 24, and to the Peninsula March 27. Siege of Yorktown April 5-May 4. West Point
May 7-8. Battle of Fair Oaks, Seven Pines, May 31-June 1. Seven days before Richmond June
25-July 1. Oak Grove, near Fair Oaks, June 25. Peach Orchard and Savage Station June 29.
White Oak Swamp and Glendale June 30. Malvern Hill July 1. Harrison's Landing July 8. At
Harrison's Landing until August 15. Movement to Alexandria August 15-28, thence to Fairfax
C. H. August 28-31. Cover Pope's retreat from Bull Run August 31-September 1. Maryland
Campaign September-October. Battle of South Mountain September 14 (Reserve). Battle of
Antietam September 16-17. Moved to Harper's Ferry September 22, and duty there until
October 30. Advance up Loudon Valley and movement to Falmouth, Va., October 30-November
17. Battle of Fredericksburg December 11-15. (Forlorn hope to cross Rappahannock at
Fredericksburg December 11.) Duty at Falmouth, Va., until April, 1863. Chancellorsville
Campaign April 27-May 6. Maryes' Heights. Fredericksburg, May 3. Salem Heights May 3-4.
Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 2-4, Advance from the
Rappahannock to the Rapidan September 13-17. Bristoe Campaign October 9-22. Bristoe
Station October 14. Advance to line of the Rappahannock November 7-8. Mine Run Campaign
November 26-December 2. Robertson's Tavern, or Locust Grove, November 27. At Stevensburg
until May, 1864. Demonstration on the Rapidan February 6-7. Campaign from the Rapidan to
the James May-June. Battles of the Wilderness May 5-7. Laurel Hill May 8. Spottsylvania
May 8-12. Po River May 10. Spottsylvania C. H. May 12-21. Assault on the Salient May 12.
North Anna River May 23-26. On line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold
Harbor June 1-12. Before Petersburg June 16-18. Siege of Petersburg June 16, 1864. to
April 2, 1865. Jerusalem Plank Road June 22-23, 1864. Demonstration north of the James
July 27-29. Deep Bottom July 27-28. Strawberry Plains, Deep Bottom, August 14-18. Ream's
Station August 25. Boydton Plank Road, Hatcher's Run, October 27-28. Dabney's Mills,
Hatcher's Run, February 5-7, 1865. Watkin's House March 25. Appomattox Campaign March
28-April 9. Crow's House March 31. Fall of Petersburg April 2. Sailor's Creek April 6.
High Bridge and Farmville April 7. Appomattox C. H. April 9. Surrender of Lee and his
army. At Burkesville until May 2. March to Washington May 2-13. Grand Review May 23. Duty
at Washington until June 30. Mustered out June 30 and discharged July 22, 1865.

Regiment lost during service 14 Officers and
147 Enlisted men killed and mortally wounded and 133 Enlisted men by disease. Total 294.

20th
Regiment Infantry

Organized at Readville August 29 to
September 4, 1861. Left State for Washington, D.C., September 4. Attached to Lander's
Brigade, Division of the Potomac, to October, 1861. Lander's Brigade, Stone's (Sedgwick's)
Division, Army of the Potomac, to March, 1862. 3rd Brigade, 2nd Division, 2nd Army Corps,
Army of the Potomac, to March, 1864. 1st Brigade, 2nd Division, 2nd Army Corps, to July,
1865.

SERVICE.--Moved to Poolesville, Md.,
September 12-15, 1861. Guard duty along Upper Potomac until December. Operations on the
Potomac October 21-24. Action at Ball's Bluff October 21. Near Edwards' Ferry October 22.
Moved to Muddy Branch December 4, and duty there until March 12, 1862. Moved to Harper's
Ferry, thence to Charlestown and Berryville, March 12-15. Ordered to Washington, D.C.,
March 24, and to the Peninsula March 27. Siege of Yorktown April 5-May 4. West Point May
7-8. Battle of Fair Oaks, Seven Pines, May 31-June 1. Seven days before Richmond June
25-July 1. Oak Grove, near Fair Oaks, June 25. Peach Orchard and Savage Station July 29.
White Oak Swamp and Glendale June 30. Malvern Hill July 1 and August 5. At Harrison's
Landing until August 15. Movement to Alexandria August 15-28, thence march to Fairfax C.
H. August 28-31. Cover retreat of Pope's army from Bull Run August 31-September 1.
Maryland Campaign September-October. South Mountain, Md., September 14 (Reserve). Battle
of Antietam September 16-17. Moved to Harper's Ferry September 22, and duty there until
October 30. Reconnaissance to Charlestown October 16-17. Advance up Loudon Valley and
movement to Falmouth, Va., October 30-November 17. Battles of Fredericksburg December
11-15. (Forlorn hope to cross Rappahannock December 11.) Duty at Falmouth until April.
Chancellorsville Campaign April 27-May 6. Maryes Heights, Fredericksburg, May 3. Salem
Heights May 3-4. Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 2-4.
Advance from the Rappahannock to the Rapidan September 13-17. Bristoe Campaign October
9-22. Bristoe Station October 14, Advance to line of the Rappahannock November 7-8. Mine
Run Campaign November 26-December 2. Demonstration on the Rapidan February 6-7, 1864. At
Stevensburg until May. Campaign from the Rapidan to the James May-June. Battles of the
Wilderness May 5-7. Laurel Hill May 8. Spottsylvania May 8-12. Po River May 10.
Spottsylvania C. H. May 12-21. Assault on the Salient May 12. North Anna River May 23-26.
Line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Before
Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865. Jerusalem
Plank Road June 22-23, 1864. Demonstration north of the James July 27-29. Deep Bottom July
27-28. Strawberry Plains, Deep Bottom, August 14-18. Ream's Station August 25. Boydton
Plank Road, Hatcher's Run, October 27-28. Dabney's Mills, Hatcher's Run, February 5-7,
1865. Watkins' House March 25. Appomattox Campaign March 28-April 9. Crow's House March
31. Fall of Petersburg April 2. Sailor's Creek April 6. High Bridge and Farmville April 7.
Appomattox C. H. April 9. Surrender of Lee and his army. At Burkesville until May 2. March
to Washington, D.C., May 2-15. Grand Review May 23. Duty at Washington until July 15.
Mustered out July 16 and discharged July 28, 1865.

Regiment lost during service 17 Officers and
243 Enlisted men killed and mortally wounded and 1 Officer and 148 Enlisted men by
disease, Total 409.

21st
Regiment Infantry

Organized at Worcester July 19 to August 19,
1861. Moved to Baltimore, Md., August 23-25; thence to Annapolis, Md., August 29; and duty
there until January 6, 1862. Attached to Reno's 2nd Brigade, Burnside's Expeditionary
Corps, to April, 1862. 2nd Brigade, 2nd Division, Dept. of North Carolina, to July, 1862.
2nd Brigade, 2nd Division, 9th Army Corps, Army of the Potomac, to April, 1863. 2nd
Brigade, 2nd Division, 9th Army Corps, Dept. of the Ohio, to June, 1863. Unassigned, 1st
Division, 23rd Army Corps, Dept. of the Ohio, to October, 1863. 1st Brigade, 2nd Division,
9th Army Corps, Dept. of the Ohio, to April, 1864. 2nd Brigade, 1st Division, 9th Army
Corps, Army of the Potomac, to June, 1863. 1st Brigade, 1st Division, 9th Army Corps, to
September, 1864. 2nd Brigade, 1st Division, 9th Army Corps, to October, 1864.

SERVICE.--Burnside's Expedition to Hatteras
Inlet January 6-February 7, 1862. Battle of Roanoke Island February 8. At Roanoke Island
until March 11. Moved to New Berne March 11-13. Battle of New Berne March 14. Expedition
to Elizabeth City April 17-19. Battle of Camden, South Mills, April 19. Duty at New Berne
until July 6. Expedition to Pollocksville to relief of 2nd Maryland, May 17. Moved to
Newport News, Va., July 6-9; thence to Fredericksburg August 2-4. March to relief of Gen.
Pope August 12-15. Pope's Campaign in Northern Virginia August 16-September 2. Battles of
Groveton August 29. Bull Run August 30, and Chantilly September 1. Maryland Campaign
September-October. Battles of South Mountain September 14, and Antietam September 16-17.
At Pleasant Valley, Md., until October 27. Movement to Falmouth, Va., October 27-November
17. Warrenton, Sulphur Springs, November 15. Battle of Fredericksburg December 12-15.
"Mud March" January 20-24, 1863. At Falmouth until February 19. Moved to Newport
News, Va., and duty there until March 26. Moved to Covington, Ky., March 26-April 1. At
Paris, Ky., April 1-5. At Mt. Sterling until July 6, and at Camp Nelson until September
12. March to Knoxville September 12-20. Operations in East Tennessee October 22-November
4. Knoxville Campaign November 4-December 23. Campbell's Station December 16. Siege of
Knoxville November 17-December 4. Pursuit of Longstreet December 5-29. Reenlisted December
29. Veterans absent on furlough January to March, 1864. Moved to Annapolis, Md., and Join
9th Army Corps. Campaign from the Rapidan to the James May-June. Battles of the Wilderness
May 5-7. Spottsylvania May 8-12. Ny River May 10. Spottsylvania C. H. May 12-21. Assault
on the Salient May 12. North Anna River May 23-26. Ox Ford May 24. Line of the Pamunkey
May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Bethesda Church June 1-3. Before
Petersburg June 16-18. Siege of Petersburg June 16-October 21. Mine Explosion, Petersburg,
July 30. Non-Veterans left front August 18 and mustered out August 30. 1864. Weldon
Railroad August 18-21. Poplar Springs Church, Peeble's Farm, September 29-October 2.
Veterans and Recruits transferred to 36th Massachusetts Infantry October 21, 1864.

Regiment lost during service 11 Officers and
148 Enlisted men killed and mortally wounded and 2 Officers and 89 Enlisted men by
disease. Total 250.

22nd
Regiment Infantry

Organized at Lynnfield September 4 to
October 6, 1861. Moved to Washington, D.C., October 8-11. Attached to Martindale's
Brigade, Porter's Division, Army of the Potomac, to March, 1862. 1st Brigade, 1st
Division, 3rd Army Corps, Army of the Potomac, to May, 1862. 1st Brigade. 1st Division,
5th Army Corps, to March, 1864. 2nd Brigade, 1st Division, 5th Army Corps, to October,
1864.

SERVICE.--Duty at Hall's Hill, Va. Defenses
of Washington until March, 1862. Advance on Manassas, Va., March 10-16. Moved to
Alexandria, thence to Fortress Monroe, Va., March 16-23. Warwick Road April 5. Siege of
Yorktown April 5-May 4. Hanover C. H. May 27. Operations about Hanover C. H. May 27-29.
Seven days before Richmond June 25-July 1. Mechanicsville June 26. Gaines' Mill June 27.
White Oak Swamp and Turkey Bridge June 30. Malvern Hill July 1. At Harrison's Landing
until August 15. Retreat from the Peninsula and movement to Centreville August 15-28.
Battle of Bull Run August 30. Battle of Antietam, Md., September 16-17. Shepherdstown
September 19. At Sharpsburg until October 30. Movement to Falmouth, Va., October
30-November 19. Battle of Fredericksburg, Va., December 12-15. Expedition to Richards' and
Ellis' Fords December 29-30. "Mud March" January 20-24, 1863. At Falmouth until
April 27. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5.
Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 2-4. At Warrenton and
Beverly Ford until September 17. At Culpeper until October 11. Bristoe Campaign October
11-22. Advance to line of the Rappahannock November 7-8. Rappahannock Station November 7.
Mine Run Campaign November 26-December 2. At Beverly Ford until May, 1864. Campaign from
the Rapidan to the James May-June. Battles of the Wilderness May 5-7. Laurel Hill May 8.
Spottsylvania May 8-12. Spottsylvania C. H. May 12-21. Assault on the Salient May 12.
North Anna River May 23-26. Line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold
Harbor June 1-12. Bethesda Church June 1-3. Before Petersburg June 16-18. Siege of
Petersburg June 16 to August 8. Relieved August 8 and guard duty at City Point until
October 5. Mustered out October 17. 1864.

Regiment lost during service 9 Officers and
207 Enlisted men killed and mortally wounded and 1 Officer and 102 Enlisted men by
disease. Total 319.

23rd
Regiment Infantry

Organized September 28, 1861. Left State for
Annapolis, Md., November 11, and duty there until January 6, 1862. Attached to Foster's
1st Brigade, Burnside's Expeditionary Corps, to April, 1862. 1st Brigade, 1st Division,
Dept. of North Carolina, to December, 1862. Heckman's Brigade, Dept. of North Carolina, to
January, 1863. 1st Brigade, 2nd Division, 18th Army Corps, Dept. of North Carolina, to
February, 1863. 1st Brigade, 1st Division, 18th Army Corps, Dept. of the South, to April,
1863. District of Beaufort, N. C., Dept. of North Carolina, to July, 1863. Defenses of New
Berne, N. C., Dept, of Virginia and North Carolina, to October, 1863. Heckman's Command,
Newport News, Va., Dept. of Virginia and North Carolina, to January, 1864. 3rd Brigade,
United States Forces, Portsmouth, Va., Dept. of Virginia and North Carolina, to April,
1864. 1st Brigade, 2nd Division, 18th Army Corps, Dept. of Virginia and North Carolina, to
September, 1864. Defenses of New Berne, N. C., Dept. of Virginia and North Carolina, to
February, 1865. 1st Brigade, 1st Division, District of Beaufort, N. C., Dept. of North
Carolina, to March, 1865. District of Beaufort, Dept. of North Carolina, to June, 1865.

SERVICE.--Burnside's Expedition to Hatteras
Inlet and Roanoke Island, N. C., January 6-February 7, 1862. Battle of Roanoke Island
February 8. On transports off Roanoke Island until March 11. Moved to New Berne, N. C.,
March 11-13. Battle of New Berne March 14. Duty at New Berne until April 11. and at
Batchelor's Creek until May 4. Batchelor's Creek April 29. Provost duty at New Berne, N.
C., until November 22. Expedition from New Berne November 2-12. Action at Rawle's Mill
November 2 (Cos. "B," "C," "D," "G" and
"I"). Demonstration on New Berne November 11. Picket and outpost duty in
vicinity of New Berne until December 10. Foster's Expedition to Goldsboro December 11-20.
Southwest Creek December 13-14. Kinston December 14. Whitehall December 16. Goldsboro
December 17. Moved to Carolina City January 13, 1863; thence to Morehead City and Hilton
Head, S.C., January 19-February 2. Camp at St. Helena Island, S.C., February 11-April 3,
Expedition against Charleston April 3-10. Moved to New Berne April 12-16. March to relief
of Little Washington April 17-19. Moved to Carolina City, N. C., April 25, and duty there
until July 2. (Co. "D" detached at Fort Spinola June 26). Reconnaissance toward
Swansbore June 27 (Co. "H"). Expedition to Trenton and Pollocksville July 4-8
(Cos. "C," "G," "H" and "K"). Action at Quaker
Bridge July 6 (Cos. "A," "B," "E," "F" and
"I"). Ordered to New Berne July 2, and duty in the Defenses of the city until
October 16. Expedition from Newport Barracks to Cedar Point July 13-16. Moved to Newport
News, Va., October 16-18, and duty there until January 22, 1864. Moved to Portsmouth, Va.,
January 22. Duty there and at Getty's Station, on Norfolk & Suffolk Railroad, until
April 26. Demonstration on Portsmouth March 1-5. Expedition to Isle of Wight County April
13-15. Action at Smithfield, Cherry Grove, April 14. Moved to Yorktown April 26. Butler's
operations on south side of James River and against Petersburg and Richmond May 4-28. Port
Walthal Junction, Chester Station, May 6-7. Swift's Creek, Arrowfield Church, May 9-10.
Operations against Fort Darling May 12-16. Drury's Bluff May 14-16. Bermuda Hundred May
16-28. Moved to White House, thence to Cold Harbor, May 28-June 1. Battles about Cold
Harbor June 1-12. Before Petersburg June 15-18. Siege of Petersburg June 15-September 4.
Mine Explosion July 30 (Reserve). Duty in the trenches at Bermuda Hundred, Va., August
25-September 4. Moved to New Berne, N. C., September 4-10. Picket, guard and patrol duty
there until March 3, 1865. Affair at Currituck Bridge September 9 (Detachment).
Non-Veterans mustered out September 28, 1864. Movements on Goldsboro March 3-14. Southwest
Creek March 7. Battle of Wise's Forks March 8-10. Occupation of Kinston March 14, and duty
there until May 2. Moved to New Berne May 2, and duty there until June 25. Mustered out
June 25, 1865.

Regiment lost during service 4 Officers and
80 Enlisted men killed and mortally wounded and 2 Officers and 132 Enlisted men by
disease. Total 218.

Source - "A Compendium of the War of the
Rebellion" by Frederick H. Dyer (Part 3)